Patent Search Resources

Canadian Intellectual Property Office – Canadian Patents Database
CIPO’s Canadian Patents Database enables access to over 75 years of patent descriptions and images. Users can search, retrieve and study more than 1,300,000 patent documents.

Community of Science, Inc. (COS) U.S. Patents Search
COS offers a comprehensive bibliographic database containing records for each of the 2.6 million U.S. patents issued since 1975.

Delphion
Delphion is part of the Thomson Corporation and is one of the world’s most popular online destinations for intellectual property and scientific research. Delphion offers subscription packages for intellectual property and business professionals.

esp@cenet
Patent search service of the European Patent Office.

FreePatentsOnline.com
FreePatentsOnline.com provides fast, easy-to-use access to millions of patents and patent applications. With the most powerful patent search engine on the web, and an ever-expanding data collection, FreePatentsOnline is rapidly becoming the premiere way to search patents. And it’s free!

MicroPatent
MicroPatent is the world’s leading source for online patent and trademark information. Combining advanced technology with the most comprehensive, up-to-date IP information, MicroPatent delivers a complete intellectual property solution – whether it’s online searching, document delivery, patent analysis, file histories, or professional search assistance.

PatentCafe – Patent Search – Intellectual Property Management
PatentCafe’s cost-efficient enterprise-level patent search and IP solutions are expandable – to meet the demanding competitive intelligence, patent clearance, internal knowledge base, portfolio exploitation, and litigation support needs of corporate executives, inventors, researchers and legal professionals.

United States Patent and Trademark Office Patent Search
Patent Full-Text and Full-Page Images Databases of the USPTO. Includes help section and operational notices and status.

WikiPatents
WikiPatents has an extensive database of patents open for public comment on the internet, free patent translation into multiple languages, and allows PDF downloading of patents in addition to other free resources.